Characterization of composite cellulosic separators for rechargeable lithium-ion batteries

doi:10.1016/S0378-7753(96)02450-0

Journal of Power Sources

Volume 63, Issue 1, November 1996, Pages 87-91

https://doi.org/10.1016/S0378-7753(96)02450-0 Get rights and content

Abstract

Thin composite cellulosic separators (39–85 lem thickness), composed of fine fibrilliform cellulosic fibres (diameter 0.5 to 5.0 μm) embedded in microporous (pore diameter: 10–200 nm) cellulosic film and soaked in ethylene carbonate or other aprotic solvent, are found to possess fair-to-moderate physical strength, an apparent complete freedom from pinholes, and a complex impedance equal to or lower than that of conventional polyolefin separators for rechargeable lithium-ion batteries. Laboratory-scale cells that comprise LiCoO₂/petroleum coke electrodes, 1.0 M LiBF₄/PC:EC:BL (25:25:50 by volume, propylene carbonate:ethylene carbonate: γ-butyrolactone) electrolyte and the cellulosic separators exhibit good initial discharge capacity and capacity retention over 41 charge/discharge cycles. The latter are indistinguishable from those obtained from a similar cell with conventional polyolefin separator.

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Citation Excerpt :
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ArticleCharacterization of composite cellulosic separators for rechargeable lithium-ion batteries

Abstract

Article
Characterization of composite cellulosic separators for rechargeable lithium-ion batteries